Askarizadeh, Hossein ; Pielsticker, Stefan ; Nicolai, Hendrik ; Kneer, Reinhold ; Hasse, Christian ; Maßmeyer, Anna (2024)
Investigation of the coupling schemes between the discrete and the continuous phase in the numerical simulation of a 60 kWth swirling pulverised solid fuel flame under oxyfuel conditions.
In: Fire, 7 (6)
doi: 10.3390/fire7060185
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
Detailed numerical analyses of pulverised solid fuel flames are computationally expensive due to the intricate interplay between chemical reactions, turbulent multiphase flow, and heat transfer. The near-burner region, characterised by a high particle number density, is particularly influenced by these interactions. The accurate modelling of these phenomena is crucial for describing flame characteristics. This study examined the reciprocal impact between the discrete phase and the continuous phase using Reynolds-averaged Navier–Stokes (RANS) simulations. The numerical model was developed in Ansys Fluent and equipped with user-defined functions that adapt the modelling of combustion sub-processes, in particular, devolatilisation, char conversion, and radiative heat transfer under oxyfuel conditions. The aim was to identify the appropriate degree of detail necessary for modelling the interaction between discrete and continuous phases, specifically concerning mass, momentum, energy, and turbulence, to effectively apply it in high-fidelity numerical simulations. The results of the numerical model show good agreement in comparison with experimental data and large-eddy simulations. In terms of the coupling schemes, the results indicate significant reciprocal effects between the discrete and the continuous phases for mass and energy coupling; however, the effect of particles on the gas phase for momentum and turbulence coupling was observed to be negligible. For the investigated chamber, these results are shown to be slightly affected by the local gas phase velocity and temperature fields as long as the global oxygen ratio between the provided and needed amount of oxygen as well as the thermal output of the flame are kept constant.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2024 |
| Autor(en): | Askarizadeh, Hossein ; Pielsticker, Stefan ; Nicolai, Hendrik ; Kneer, Reinhold ; Hasse, Christian ; Maßmeyer, Anna |
| Art des Eintrags: | Bibliographie |
| Titel: | Investigation of the coupling schemes between the discrete and the continuous phase in the numerical simulation of a 60 kWth swirling pulverised solid fuel flame under oxyfuel conditions |
| Sprache: | Englisch |
| Publikationsjahr: | Juni 2024 |
| Ort: | Basel |
| Verlag: | MDPI |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Fire |
| Jahrgang/Volume einer Zeitschrift: | 7 |
| (Heft-)Nummer: | 6 |
| Kollation: | 21 Seiten |
| DOI: | 10.3390/fire7060185 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | Detailed numerical analyses of pulverised solid fuel flames are computationally expensive due to the intricate interplay between chemical reactions, turbulent multiphase flow, and heat transfer. The near-burner region, characterised by a high particle number density, is particularly influenced by these interactions. The accurate modelling of these phenomena is crucial for describing flame characteristics. This study examined the reciprocal impact between the discrete phase and the continuous phase using Reynolds-averaged Navier–Stokes (RANS) simulations. The numerical model was developed in Ansys Fluent and equipped with user-defined functions that adapt the modelling of combustion sub-processes, in particular, devolatilisation, char conversion, and radiative heat transfer under oxyfuel conditions. The aim was to identify the appropriate degree of detail necessary for modelling the interaction between discrete and continuous phases, specifically concerning mass, momentum, energy, and turbulence, to effectively apply it in high-fidelity numerical simulations. The results of the numerical model show good agreement in comparison with experimental data and large-eddy simulations. In terms of the coupling schemes, the results indicate significant reciprocal effects between the discrete and the continuous phases for mass and energy coupling; however, the effect of particles on the gas phase for momentum and turbulence coupling was observed to be negligible. For the investigated chamber, these results are shown to be slightly affected by the local gas phase velocity and temperature fields as long as the global oxygen ratio between the provided and needed amount of oxygen as well as the thermal output of the flame are kept constant. |
| Freie Schlagworte: | pulverised solid fuel combustion, RANS numerical simulations, coupling schemes between the discrete and the continuous phase, particle number density |
| ID-Nummer: | Artikel-ID: 185 |
| Zusätzliche Informationen: | This article belongs to the Special Issue Combustion and Fire I |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften und Maschinenbau |
| Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau 16 Fachbereich Maschinenbau > Fachgebiet Simulation reaktiver Thermo-Fluid Systeme (STFS) |
| Hinterlegungsdatum: | 19 Sep 2024 05:35 |
| Letzte Änderung: | 19 Sep 2024 12:03 |
| PPN: | 521598486 |
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| Suche nach Titel in: | TUfind oder in Google |
Verfügbare Versionen dieses Eintrags
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Investigation of the Coupling Schemes between the Discrete and the Continuous Phase in the Numerical Simulation of a 60 kWth Swirling Pulverised Solid Fuel Flame under Oxyfuel Conditions. (deposited 18 Sep 2024 11:48)
- Investigation of the coupling schemes between the discrete and the continuous phase in the numerical simulation of a 60 kWth swirling pulverised solid fuel flame under oxyfuel conditions. (deposited 19 Sep 2024 05:35) [Gegenwärtig angezeigt]
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